What do you wear under mini skirt???

I have been wondering what everyone wear under a mini skirt or mini dress? Is there a special kind of underwear that I don't know about? I worry about my panty showing when I bend over and I can't relax.

Nothing...
Seriously if I wear a mini skirt, the only way I feel comfortable is having opaque tights.
If not, I don´t bend over and wear boyshorts but that psychological bc honestly no one should ever see your underwear. (unless wind blows !)